0FriendOfHumanity 6 years ago ReplyUpvote I like snails. Here is a link to give you the information that you need.http://animals.about.com/od/mollusks/ig/World-of-Snails/Reproduction.htm Here is a summary from the link. Estivation Snails are usually active in the summer, but if it gets too warm or too dry for them, they . . . retreat into their shell . . . mucous membrane dries over the opening of their shell, . . . .Hibernation In late autumn when temperatures drop, snails go into hibernation. . . . They retreat into their shell and seal its opening with a thin layer of white chalk. When spring comes (and with it rain and warmth), the snail wakes and pushes the chalk seal to open the shell once again . . .